What steps will reproduce the problem?

gdb cannot locate the runtime-gdb.py helper on go installations which were built using
GOROOT_FINAL.

What is the expected output?

gdb can find runtime-gdp.py

What do you see instead?

lucky(~/devel/src/code.google.com/p/go.crypto/ssh) % gdb ./ssh.test 
GNU gdb (Ubuntu/Linaro 7.3-0ubuntu2) 7.3-2011.08
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>;
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>;...
Reading symbols from /home/dfc/devel/src/code.google.com/p/go.crypto/ssh/ssh.test...done.
warning: /build/buildd/golang-tip-12420/src/pkg/runtime/runtime-gdb.py (referenced in
.debug_gdb_scripts): No such file or directory
(gdb) quit
lucky(~/devel/src/code.google.com/p/go.crypto/ssh) % readelf ./ssh.test -p
.debug_gdb_scripts

String dump of section '.debug_gdb_scripts':
  [     1]  /build/buildd/golang-tip-12420/src/pkg/runtime/runtime-gdb.py

lucky(~/devel/src/code.google.com/p/go.crypto/ssh) % find /usr/lib/go -name
runtime-gdb.py
/usr/lib/go/src/pkg/runtime/runtime-gdb.py

Which compiler are you using (5g, 6g, 8g, gccgo)?

6g

Which operating system are you using?

linux

Which revision are you using?  (hg identify)

% go version
go version weekly.2012-02-22 +9dd9374109a9

Please provide any additional information below.

This is using the canonical provided golang-tip ppa, however I think the issue will
occur on any go installation where GOROOT and GOROOT_FINAL differ.